#include <iostream>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
using namespace std;

int main()
{

    //close(1);
    int fd1 = open("log1.txt",O_WRONLY | O_CREAT | O_TRUNC,0666);
    int fd2 = open("log2.txt",O_WRONLY | O_CREAT | O_TRUNC,0666);
    int fd3 = open("log3.txt",O_WRONLY | O_CREAT | O_TRUNC,0666);
    int fd4 = open("log4.txt",O_WRONLY | O_CREAT | O_TRUNC,0666);
    
    dup2(fd1,1);

    printf("fd1:%d\n",fd1);
    printf("fd2:%d\n",fd2);
    printf("fd3:%d\n",fd3);
    printf("fd4:%d\n",fd4);

    return 0;
}
